/// <summary>
/// Initializes states for formatting.
/// </summary>
/// <param name="lastCaretPosition">The last caret position before the formatting.</param>
/// <param name="focusState">The critical state of the TextBox's focus.</param>
/// <param name="caretPosition"></param>
/// <param name="unformattedValue"></param>
/// <param name="jumpCaretToEndOfInteger"></param>
/// <returns></returns>
internal ProcessingState GetProcessingStates(
Int32 lastCaretPosition,
FocusState focusState,
Int32 caretPosition,
String unformattedValue,
Boolean jumpCaretToEndOfInteger
)
{
var state = new ProcessingState(unformattedValue, jumpCaretToEndOfInteger)
{
Controller = this,
Formatting = { CaretPosition = caretPosition },
LastCaretPosition = lastCaretPosition,
};
SetFormattingType(state);
SetNeedHighlightInput(state);
SetPreviousStates(state);
if (state.FormattingType == FormattingAfter.OneSymbolDeleted)
{
state.OneSymbolDeletionType = state.Formatting.CaretPosition < lastCaretPosition
? DeletionDirection.BackspaceButton
: DeletionDirection.DeleteButton;
}
state.GroupSeparatorDeleted = GetStateGroupSeparatorDeleted(state);
SetPreservePositionForGroupSeparator(state);
SetPreservePositionForDeletionOfDigitBeforeGroupSeparator(state);
return(state);
}
/// <summary>
/// Defines the formatting type <see cref="FormattingAfter"/>.
/// </summary>
/// <param name="state"> </param>
/// <returns>The value of the <see cref="FormattingAfter"/></returns>
private void SetFormattingType(ProcessingState state)
{
FormattingAfter formattingAfter;
if (_textBeforeChangingNotNull.IsNullOrEmpty() &&
state.UnformattedValue.IsNullOrEmpty())
{
formattingAfter = FormattingAfter.EmptyValueBeforeAndNow;
}
else if (_textBeforeChangingNotNull.IsNotNullOrEmpty() &&
state.UnformattedValue.IsNullOrEmpty())
{
formattingAfter = FormattingAfter.EmptyValueBecome;
}
else if (state.UnformattedValue == _textBeforeChangingNotNull)
{
formattingAfter = FormattingAfter.ResettingTheSame;
}
else if (Math.Abs(state.UnformattedValue.Length - _textBeforeChangingNotNull.Length) != 1)
{
formattingAfter = FormattingAfter.GroupPastingOrDeletion;
}
else
{
var subtraction = state.UnformattedValue.Length - _textBeforeChangingNotNull.Length;
formattingAfter = 0 < subtraction
? FormattingAfter.OneSymbolAdded
: FormattingAfter.OneSymbolDeleted;
}
state.FormattingType = formattingAfter;
NumberToMoneyConverter.WriteLogAction(() => String.Format(" !! FormattingType = {0}", formattingAfter));
}
/// <summary>
/// Sets the previous number states.
/// </summary>
/// <param name="state"></param>
private void SetPreviousStates(ProcessingState state)
{
if (_textBeforeChangingNotNull.IsNullOrEmpty())
{
return;
}
var number = _textBeforeChangingNotNull.Split(DecimalSeparator);
state.IntegerPrevious = number.First();
state.PartialPrevious = PartialDisabled ? String.Empty : number.Last();
}
/// <summary>
/// <see cref="ProcessingState.PreservePositionForDeletionOfDigitBeforeGroupSeparator"/>.
/// </summary>
/// <param name="state"></param>
private void SetPreservePositionForDeletionOfDigitBeforeGroupSeparator(ProcessingState state)
{
if (state.OneSymbolDeletionType != DeletionDirection.DeleteButton)
{
return;
}
if (_groupSeparatorDynamic == Char.MinValue)
{
// The Group Separator don't set.
return;
}
var charAfterCaret = state.UnformattedValue.ElementAtOrDefault(state.Formatting.CaretPosition);
var notGroupSeparator = charAfterCaret != _groupSeparatorDynamic;
if (notGroupSeparator)
{
return;
}
state.PreservePositionForDeletionOfDigitBeforeGroupSeparator = true;
}
/// <summary>
/// <see cref="ProcessingState.PreservePositionForGroupSeparatorOnFocus"/>.
/// </summary>
/// <param name="state"></param>
private void SetPreservePositionForGroupSeparator(ProcessingState state)
{
if (state.FormattingType != FormattingAfter.ResettingTheSame)
{
return;
}
if (_groupSeparatorDynamic == Char.MinValue)
{
// The Group Separator don't set.
return;
}
var charAfterCaret = state.UnformattedValue.ElementAtOrDefault(state.Formatting.CaretPosition);
var notGroupSeparator = charAfterCaret != _groupSeparatorDynamic;
if (notGroupSeparator)
{
return;
}
state.PreservePositionForGroupSeparatorOnFocus = true;
}
private Boolean?GetStateGroupSeparatorDeleted(ProcessingState state)
{
if (state.FormattingType != FormattingAfter.OneSymbolDeleted)
{
return(null);
}
if (_groupSeparatorDynamic.IsDefault())
{
return(null);
}
for (var i = 0; i < state.UnformattedValue.Length; i++)
{
if (state.UnformattedValue[i] == _textBeforeChangingNotNull[i])
{
continue;
}
return(_textBeforeChangingNotNull[i] == _groupSeparatorDynamic);
}
return(false);
}
/// <summary>
/// Sets state that required fire a custom hilighting of an input.
/// </summary>
/// <param name="state"></param>
private void SetNeedHighlightInput(ProcessingState state)
{
// it3xl.com: It's a feature for the future.
}